Texture and anisotropy of hot-pressed h-BN matrix composite ceramics with in situ formed YAG

Authors: Zhuo Zhang, Xiaoming Duan, Zhuo Tian, Yujin Wang, Lan Wang, Lei Chen, Baofu Qiu, Delong Cai, Peigang He, Dechang Jia, Yu Zhou

Published: 2022-03-17

DOI: 10.1007/s40145-021-0553-3

Source: Full article


Abstract

AbstractTextured hexagonal boron nitride (h-BN) matrix composite ceramics were prepared by hot-pressing using different contents of 3Y2O3−5Al2O3 (molar ratio of 3:5) as the sintering additive. During hot-pressing, the liquid Y3Al5O12 (YAG) phase showing good wettability to h-BN grains was in situ formed through the reaction between Y2O3 and Al2O3, and a coherent relationship between h-BN and YAG was observed with $${\left[ {010} \right]_{{\rm{h}} - {\rm{BN}}}}{\rm{//}}{\left[ {111} \right]_{{\rm{YAG}}}}$$